土工基础

土工基础 ›› 2021, Vol. 35 ›› Issue (3): 297-301.

• 工程实录 • 上一篇    下一篇

桩锚支护体系超期服役安全评估方法与实例分析

童 寅1，王 鑫2   

  1. （1.长沙市规划设计院有限责任公司，长沙 410007；2.北京市勘察设计研究院有限公司，北京 100038）
  • 收稿日期:2021-02-28 修回日期:2021-03-04 出版日期:2021-06-25 发布日期:2021-06-25
  • 作者简介:童 寅（1986-），男，工程师，研究方向为岩土工程勘察设计。

Safety Evaluation Method and Case Analysis of Soldier Pile and Ground Anchor Retaining Structure in the Extended Service

TONG Yin1, WANG Xin2   

  1. (1.Changsha Planning & Design Institute Co., Ltd., Changsha 410007; 2.BGI Engineering Consultants Ltd., Beijing 100038)
  • Received:2021-02-28 Revised:2021-03-04 Online:2021-06-25 Published:2021-06-25

摘要： 基坑支护结构作为一种临时性围护体系，设计使用年限一般为1~2年，而很多深基坑支护工程往往存在超期服役的现象。对于超期后如何界定其安全性、如何确定加固方案或持续使用期限，目前并尚无技术标准进行判定。依托某实际超期基坑工程，从支护结构实体检测、鉴定与变形监测数据分析的角度出发，结合支护结构计算、数值模拟的手段，总结出一套适用于桩锚结构超期评估的思路与方法，旨在为类似工程提供参考。

关键词: 深基坑, 设计使用年限, 超期服役, 结构鉴定, 安全评估

Abstract: As a temporary retaining system, the design service life of the deep excavation support structure is generally 1~2 years, however, many excavation supporting projects often have undertaken the extended service. At present, there is no technical specification to determine how to define the safety of the supporting structure, how to determine the reinforcement scheme or the supporting structure sustained service life after the expiration date. Based on an actual overdue foundation pit project, from the perspective of supporting structure entity detection, identification and deformation monitoring data analysis, combined with supporting structure calculation and numerical simulation, this paper summarizes a set of ideas and methods suitable for overdue evaluation of pile anchor structure, which is intended to provide reference for similar projects.

Key words: Deep Excavation, Design Service Life, Extended Service, Structure Inspection, Safety Assessment

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